You're more than welcome to bring your insulin on-board - in fact we strongly encourage this! You may place your insulin and other assistive devices in a bag of their own. This bag will not be charged and doesn't count towards the baggage allowance as long as it only contains your insulin and assistive devices! Please keep in mind that if there are any other items, socks, clothing, etc., in the bag, it will be charged accordingly. For more information on traveling with insulin , please visit www.tsa.gov.